215438935716 has 27 divisors (see below), whose sum is σ = 544588793931. Its totient is φ = 71812050264.

The previous prime is 215438935619. The next prime is 215438935757. The reversal of 215438935716 is 617539834512.

It is a happy number.

The square root of 215438935716 is 464154.

It is a perfect power (a square), and thus also a powerful number.

215438935716 is a `hidden beast` number, since 2 + 1 + 543 + 8 + 93 + 5 + 7 + 1 + 6 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2746245 + ... + 2823603.

Almost surely, 2^215438935716 is an apocalyptic number.

215438935716 is the 464154-th square number.

It is an amenable number.

215438935716 is an abundant number, since it is smaller than the sum of its proper divisors (329149858215).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

215438935716 is an frugal number, since it uses more digits than its factorization.

215438935716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154728 (or 77364 counting only the distinct ones).

The product of its digits is 5443200, while the sum is 54.

The spelling of 215438935716 in words is "two hundred fifteen billion, four hundred thirty-eight million, nine hundred thirty-five thousand, seven hundred sixteen".